Exhibit 24

                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 14, 1997.
                                                                     ----
                                                              




                                                        /s/ P. Roy Vagelos
                                                        ------------------
                                                        P. Roy Vagelos, M.D.

                                     


                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 13, 1997.
                                                                     ----



                                             /s/ Charles A. Baker
                                             --------------------
                                             Charles A. Baker




                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 14, 1997.
                                                                     ----




                                         /s/ Michael S. Brown
                                         --------------------
                                         Michael S. Brown, M.D.



                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 14, 1997.
                                                                     ----




                                            /s/ Alfred G. Gilman
                                            ------------------------------
                                            Alfred G. Gilman, M.D., Ph.D.



                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 13, 1997.
                                                                     ----





                                             /s/ Joseph L. Goldstein
                                            ---------------------------
                                             Joseph L. Goldstein, M.D.



                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 19, 1997.
                                                                     ----




                                             /s/ Fred A. Middleton
                                             ---------------------
                                             Fred A. Middleton



                                Power of Attorney
                                -----------------

         KNOW ALL PERSONS BY THESE PRESENTS, that I the undersigned, a director
of Regeneron Pharmaceuticals, Inc., a New York corporation, do hereby constitute
and appoint Leonard S. Schleifer and Paul Lubetkin, and each of them severally
to be my true and lawful attorneys-in-fact and agents each acting alone with
full power of substitution and revocation, to sign my name to the Regeneron
Pharmaceuticals, Inc. Annual Report on Form 10-K for the year ended December 31,
1996 and any and all amendments to such Annual Report, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, and I hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as full as to all
intents and purposes as such person might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, I have subscribed these presents as of March 13, 1997.
                                                                     ----




                                                    /s/ Eric M. Shooter
                                                    ----------------------
                                                    Eric M. Shooter, Ph.D.